From: Lulu Cheng <chenglulu@loongson.cn>
Date: Thu, 18 Aug 2022 01:57:14 +0000 (+0800)
Subject: LoongArch: Get __tls_get_addr address through got table when disable plt.
X-Git-Tag: basepoints/gcc-14~5103
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b7d62c551f34bbb6b519160b98d73e1bc5484719;p=thirdparty%2Fgcc.git

LoongArch: Get __tls_get_addr address through got table when disable plt.

Fix bug, ICE with tls gd/ld var with -fno-plt.

gcc/ChangeLog:

	* config/loongarch/loongarch.cc (loongarch_call_tls_get_addr):
	Get __tls_get_addr address through got table when disable plt.

gcc/testsuite/ChangeLog:

	* gcc.target/loongarch/tls-gd-noplt.c: New test.
---

diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
index 79687340dfdc..243781436410 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -2448,8 +2448,18 @@ loongarch_call_tls_get_addr (rtx sym, enum loongarch_symbol_type type, rtx v0)
 	gcc_unreachable ();
     }
 
-  insn = emit_call_insn (gen_call_value_internal (v0, loongarch_tls_symbol,
-						  const0_rtx));
+  if (flag_plt)
+    insn = emit_call_insn (gen_call_value_internal (v0, loongarch_tls_symbol,
+						    const0_rtx));
+  else
+    {
+      rtx dest = gen_reg_rtx (Pmode);
+      rtx high = gen_reg_rtx (Pmode);
+      loongarch_emit_move (high, gen_rtx_HIGH (Pmode, loongarch_tls_symbol));
+      emit_insn (gen_ld_from_got (Pmode, dest, high, loongarch_tls_symbol));
+      insn = emit_call_insn (gen_call_value_internal (v0, dest, const0_rtx));
+    }
+
   RTL_CONST_CALL_P (insn) = 1;
   use_reg (&CALL_INSN_FUNCTION_USAGE (insn), a0);
   insn = get_insns ();
diff --git a/gcc/testsuite/gcc.target/loongarch/tls-gd-noplt.c b/gcc/testsuite/gcc.target/loongarch/tls-gd-noplt.c
new file mode 100644
index 000000000000..32a0acf9b181
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/tls-gd-noplt.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-plt -mcmodel=normal" } */
+/* { dg-final { scan-assembler "pcalau12i\t.*%got_pc_hi20\\(__tls_get_addr\\)" } } */
+
+__attribute__ ((tls_model ("global-dynamic"))) __thread int a;
+
+void
+test (void)
+{
+  a = 10;
+}
+